Photoprinting apparatus.



W. F. TAYLOR.

PHOTOPRINTING APPARATUS.

APPLICATION FILED JUNE4. 1914.

1.200301. Patented Oct. 10,1916. v 3 SHEETS-SHEET, 1.

W. F. TAYLOR.

PHOTOPRINTING APPARATUS.

APPLICATION FILED JUNE 4. 1914.

1,200,901. Patented Oct. 10,1916.

3 SHEETS-SHEE T 2.

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W- F. TAYLOR.

PHOTOPRINTING APPARATUS.

APPLICATION FILED mm. 1914.

Patented Oct. 10, 1916.

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WILLIAM F. TAYLOR, 0F WILMINGTON, OHIO.

PHOTOPRINTING APPARATUS.

Specification of Letters Patent.

Patented Oct. 10, 1916.

Application filed June 4, 1914. Serial No. 843,086.

To whom it may concern:

Be it known that I, IVILLIAM F. TAYLOR, a citizen of the United States, residing at Wilmington, in the county of Clinton andv State of Ohio, have invented certain new and useful Improvements in Photoprinting Apparatus, of which the following is a specification.

My invention relates to the art of photoprinting and aims particularly to provide an apparatus by the use of which a photo print may be very efficiently made.

One of the main objects of my invention resides in providing an apparatus of this type wherein a time set mechanism is used for governing the length of time that a print may be exposed to the light. Preferably, I employ some form of illumination such as electric light, and control the length of illuminated period by the use of this time set mechanism.

Another object of my invention resides in a governing structure for this time set mechanism whereby any time period usually required for the exposure of photo prints may be had. In other words, I have employed a structure whereby the light is automatically extinguished at the end of any given time period.

Another object of my invention resides in providing a starting means for simultaneously setting the time set mechanism in operation and lighting the illuminating means. By this structure, the illuminating means is insured a definite period of operation and, should it be desired to expose the print to say, fifteen seconds, the governing structure is set for this time period and as soon as the starting means are set in operation, the illuminating means will also be lighted and be maintained lighted for the fifteen seconds.

Other objects of my invention will become more apparent after a further detailed description of the accompanying sheets of drawings, which represent one embodiment of my invention.

In these drawings, similar characters of reference designate corresponding parts, and Figure 1 represents a face View of a cabinet within which the operating structure is confined, Fig. 2 is a side elevation of my cabinet shown extended and showing the printing frame in section, Fig. 3 is a section of the casing in a similar position as shown in 1, with the front wall removed. Fig. 4 is a horizontal section of the structure shown in Fig. 3, Fig. 5 is an enlarged detail of the time set mechanism shown in connection with the operating switch, Fig. 6 is a side view of the operating mechanism shown in Fig. 5, and, Fig. 7 is a top view of the operating mechanism as shown in Fig. 5.

In the drawings, I have shown a cabinet as being formed of telescoping sections 1 and 2, the section 2 being designed to telescope within the sectionlandthetop walls of both of these sections being provided with suitable openings to removably accommodate a printing frame structure shown generally at 3. This printing frame structure is preferably removably held in position by means of dowel pins 4; and is further provided with supporting angles 5 upon which rests the glass member 6. As is usual in these printing frames, a divided top board 7 is also provided to hold the printing paper in its correct osition with respect to the film or plate from which the print is desired. If it is desired to telescope the sections of the cabinet, the printing frame 3 is removed and placed within the cabinet, entrance being effected through the hinged rear door shown at 8. After this printing frame has been removed and the sections telescoped, the remaining small open portion in the top wall may be closed by folding up of the hinged gate 9 and held in position by any type of locking structure 10. The front wall of the section 1 of the cabinet is provided with an indicating dial 11 which cooperates with a time set mechanism to be presently described and which mechanism is confined within a housing portion 12. This housing portion is so located in the present instance. that it is necessary to cut out a smallportion 13 of the two side walls of the section 2 and when this section is in extended position, such as is shown in Fig. 2. the slight openings caused by these outout portions are closed by sliding shutters 1 1 held confined bv means of guide-ways 15 shown dotted in Fig. 2.

Y The inside of the top wall of the section 1 carries a switch member shown more clearly in Fig. 3, this switch member comprising a single throw arm 16 adapted to cooperate with a contact post 17 This switch is adapted to control the flow of current to an incandescent light bulb shown on the inside of the casing at 18, it being the purpose of this bulb to furnish sufficient illumination to expose any print that may be within the printing frame 3. I have also shown an incandescent bulb 19 carried on the outside of the casing, this bulb being formed with a dull finish or suitably colored glass that will not injure any printed picture before it is developed. Current to both of these bulbs is supplied through the lead wires 20 carrying aplug 21 at their ends and being designed to fit in the standard type of socket now in use.

The time set mechanism for use in connec tion with the switch member is shown more clearly in Figs. 5, 6 and 7. This time set mechanism is, as previously stated, confined within the housing 12 and also supported within the two side frame pieces 22. The motive power for this mechanism is furnished by a spiral spring 23, one end of which is rigidly attached to a rotatable spindle 24, while the opposite end is rigidly attached to the stationary post 25. A large gear wheel 26 is loosely attached to the spindle 24 and meshes with a pinion 27 carried upon a spindle 28. This gear 26 is loosely mounted upon its spindle so that the remaining gears with which it meshes will not be caused to operate when the spring is wound or the spindle 24- given a partial clockwise rotation. However, reverse or counter clockwise movement of the spindle 24 should cause movement of the remaining gears and I have, therefore, provided a clutch mechanism in the nature of a ratchet wheel 48 rigidly attached to this spindle and adapted to coiiperate with a spring actuated pawl 49 pivoted as at 50 to the outer edge of the large gear 26. Therefore, turning of the spindle 24 in aclockwise direction, permits the gear 26 to remain stationary because of the relative movement between the ratchet 48 and the pawl 49. However, reverse move-- ment causes a locking between the ratchet 48 and the pawl 49 and, therefore, a keying of the gear 26 to its spindle and a consequent operation of the remaining gears. This second spindle also carries a larger gear wheel 29 which forms a portion of the train of gearing carried upon spindles 30, 31 and 32. The prime reason for this train of gearing, is to insure a sufficient reduction in speed and for the mechanism to operate after the manner of a clock, the fan wheel 33 upon the spindle 32 serving as the governing medium to insure a reasonable correctness of speed. It is to be understood that the exposures in printing pictures are timed in seconds and it will, therefore, be apparent that a very sensitive time set mechanism is not essential, it being only necessary to attain a reason able time correctness. To this end, the mechanism here shown as comprising mainly the large coiled spring 23, the train of gearing and the fan wheel 33, effectively serves the purpose. The gear 34 mounted upon the spindle 31 is also provided with a pin prodesired obstruction may be had by the wire 36 pivoted intermediate its ends at 37 and being provided with a downwardly projecting portion 38 so that when this wire is moved about its pivot to the position shown in Fig. 5, it will lie in the path of rotation of the pin 35 and, therefore, stop operation of the mechanism. The opposite end 39 of the wire 36 engages the lower end 40 of a lever 41 centrally pivoted as at 42. The opposite end of the centrally pivoted lever 41 terminates in outwardly projecting tongues 43 adapted to embrace an extension 44 carried about midway on the rod 45. This rod 45 connects with the arm 16 of the switch member at one end and terminates at its opposite end in a right angular projecting portion 46. This angular portion 46 is adapted to project through the front face of the section 1 of the casing, as is clearly shown in Fig. 1. Again referring to Fig. 1, it will be noted that the spindle 24 upon which the main drive spring 23 is mounted, also carries an indicating arm 47, this indicating arm being mounted on the outside of the casing and adapted to play over the calibrated dial 11.

The operation of my device is as follows: The printing frame 3 is suitably-equipped and set into position. after the sections 1 and 2 of the cabinet have been moved to the exis wanted, whereupon the indicating arm 47 is moved in a clockwise direction to a point opposite the desired number of seconds. It

will. be observed that moving of the arm 47 v in this clockwise direction, serves to wind the main spring 23, but leaves the train of gearing stationary because the large gear 26 is loosely mounted upon the spindle 24 and the operation of the ratchet and pawl 48 and 49 is such as to permit it to remain in this stationary position. When everything is in readiness, the angular extremity 46 of the rod 45 is given an upward movement, this upward movement simultaneously mov ing the switch arm 16 to a position of engagement with the contact post 17 and causing disengagement of the angular extension 38 of the wire 37 with the pin 35 on the gear 34. This action unlocks the time mechanism and permits its operation. The spindle 24 now moves in a counter clockwise direction and still carries the indicating arm 47 with it. When this indicating arm reaches a position opposite the first second indication on the dial, it engages the angular extension 46 and a very slight continued motion will move it to the position shown in Fig. 1, which is the position in which the pivoted wire 37 is again moved so that its angular extension 38 engages the pin on the gear 34 to stop operation of the time mechanism. It will, therefore, be apparent that I have provided an apparatus in which the exposures may be very accurately timed and which at the same time acts automatic. This latter feature is very desirable in that it does not require the constant attention of the operator, but permits him to accomplish other things during the actual exposing procedure.

What I claim, is:

1. A photo printing time set mechanism for governing the illuminated period comprising a movable stop member for locking the mechanism against operation, governing mechanism for regulating the illuminated period, an indicator forming a portion of said governing mechanism arranged to run free of the time set mechanism in one direction and with this time set mechanism in the other direction, an electric switch, and starting means operatively connected to both said switch and said stop member.

2. A photo printing time set mechanism for governing the illuminated period comprising a spring actuated mechanism, looking means normally holding said mechanism locked, a suitably designated dial, an indicator arm movable in one direction free of said mechanism, but under the control of said mechanism when moving in the opposite direction, and means operated by said arm in its return movement to operate said locking means to stop the spring actuated mechanism and extinguish the illumination after a predetermined period.

3. A photo printing time set mechanism for governing the illuminated period comprising a spring actuated mechanism arranged to automatically extinguish an illuminating means, an indicator arm movable free of said mechanism in one direction but under the control of said mechanism when moving in the opposite direction, and means arranged after said arm has been moved forward to simultaneously light an illuminating means and set said mechanism in operation to cause return movement of said arm, said arm again causing the automatic Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

